What is the function of sebaceous glands?

Sebaceous glands play a crucial role in maintaining the health and integrity of the skin. Their primary function is to produce sebum, an oily substance that helps to lubricate and protect the skin and hair. This oil creates a barrier that traps moisture, preventing the skin from drying out and reducing the likelihood of irritations and infections. Sebum also has antibacterial properties, which can aid in preventing the growth of harmful bacteria on the skin's surface.

In contrast to the other choices, regulating body temperature is primarily the role of sweat glands, which help cool the body through perspiration. While sweat is involved in thermoregulation, it does not provide the protective oily layer that sebum does. Generating electrical impulses pertains to nerve cells, which are responsible for transmitting signals throughout the body, rather than any function of the sebaceous glands. Each of these functions highlights the specialized roles within the integumentary system, with sebaceous glands specifically focusing on oil production for skin protection.